implemented get/put_profit_loss api with frontend

main.py

@@ -87,6 +87,18 @@ def on_connect():
                   })
 
 
+@socketio.on('get_profit_loss')
+def on_get_profit_loss(message):
+    start = message['start']
+    end = message['end']
+
+    profit_loss = loop.run_until_complete(bot.get_profit_loss(start, end))
+
+    socketio.emit("put_profit_loss", {
+        "pl" : profit_loss[0],
+        "pl_perc": profit_loss[1]
+    })
+
 ###################################
 # Bot callbacks
 ###################################